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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.apache.tuscany.core.context.scope;
import org.apache.tuscany.core.context.ScopeStrategy;
import org.apache.tuscany.model.assembly.Scope;
/**
* Implements basic scope strategy functionality
*
* @version $Rev$ $Date$
*/
public abstract class AbstractScopeStrategy implements ScopeStrategy {
public AbstractScopeStrategy() {
}
/**
* Determines legal scope references according to standard SCA scope rules
*
* @param pReferrer the scope of the component making the reference
* @param pReferee the scope of the component being referred to
*/
public boolean downScopeReference(Scope pReferrer, Scope pReferee) {
if (pReferrer == Scope.UNDEFINED || pReferee == Scope.UNDEFINED) {
return false;
}
if (pReferee == pReferrer){
return false;
}else if(pReferrer == Scope.INSTANCE){
return false;
}else if(pReferee == Scope.INSTANCE){
return true;
}else if (pReferrer == Scope.REQUEST && pReferee == Scope.SESSION){
return false;
}else if (pReferrer == Scope.REQUEST && pReferee == Scope.MODULE){
return false;
// }else if (pReferrer == Scope.SESSION && pReferee == Scope.REQUEST){
// return true;
}else if (pReferrer == Scope.SESSION && pReferee == Scope.MODULE){
return false;
// }else if (pReferrer == Scope.MODULE){
// return true;
}else{
return true;
}
//FIXME Jim this does not work with enumerations, what does it mean to have a scope <0?
// } else if ((pReferrer < 0) || (pReferee < 0)) {
// return false;
// }
//
// return (pReferrer > pReferee);
// return pReferrer != pReferee;
}
}
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